One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,4)(3,7,8,6)(9,10)(11,13)(12,14)(15,16)(17,18,22,29,23,28,39,27)(19,30,34,45,33,24,32,42)(20,26,37,44,21,38,36,25)(31,41,47,40,35,46,48,43)(1,3,5,8)(2,6,4,7)(9,10)(11,15)(12,14)(13,16)(17,19)(18,24)(20,35)(21,31)(22,34)(23,33)(25,43)(26,41)(27,45)(28,30)(29,42)(32,39)(36,47)(37,48)(38,46)(40,44)(1,2,5,4)(3,6,8,7)(9,11)(10,13)(12,16)(14,15)(17,20)(18,25)(19,31)(21,23)(22,36)(24,40)(26,27)(28,44)(29,38)(30,43)(32,47)(33,35)(34,48)(37,39)(41,42)(45,46)(3,8)(6,7)(11,16)(13,15)(17,21,23,20)(18,26,28,38)(19,31,33,35)(22,36,39,37)(24,41,30,46)(25,29,44,27)(32,48,34,47)(40,45,43,42)(1,4,5,2)(3,7,8,6)(10,14)(13,15)(17,22,23,39)(18,27,28,29)(19,32,33,34)(20,36,21,37)(24,42,30,45)(25,26,44,38)(31,47,35,48)(40,41,43,46)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.